*{
    margin: 0;
    padding: 0;
}
.art-bgd img{
    width: 100%;
}
.nav-tabs .active a{
    color: #fff;
}
.nav-tabs{
    width: auto;
    text-align: center;
}
.nav-tabs a:hover{
    background-color: #F53D1F !important;
    border-radius: 25px;
    color: #fff;
}
.nav-tabs .active a:hover{
    color: #fff !important;
}
.col-md-3{
    margin-top: 15px;
}


.nav-tabs > li, .nav-pills > li {  /* 选项卡  头部居中 */
    float:none;
    display:inline-block;
    *display:inline; /* ie7 fix */
     zoom:1; /* hasLayout ie7 trigger */
}
.nav-tabs, .nav-pills {
    text-align:center;
}


.art-tu img{
    width: 100%;
}
.art{
    padding: 2%;
}
.art-tu:hover img{
    transform: scale(1.05);
    transition: all 0.5s;
}